Binder for loose-leaf books.



c. B. CHAPMAN.

BINDER FOB 1.0053 LEAF BOOKS.

APPLIOATIOE nun) xov. 23, 1908.

Pawnteti July 27, 1909.

locks unattached.

CHARLES BRIGHTMER CHAPMAN, OF LONDON, ONTARIO, CANADA.

BINDER FQR LOOSE-LEAF BOOKS.

Specification of Letters Patent.

Patented July 27, 1909.

Application filed November 23, 1908. Serial No. 464,114.

To all whom it may concern.

Be it known that 1, CHARLES BRIGHTMER CHAPMAN, of the city of London, inthe county of Middlesex, in the Province of Ontario, Canada, bookbinder,having invented certain new and useful Improvements in Binders iorLoose-Leaf Books, do hereby declare that the following is a full, clear,and exact description of the same.

My invention relates to il'nprovements in binders for loose leaf books,in which upright metal posts are used attached to book covers, and theobjects of my improvements are 1; To permit the quick removal oraddition of sheets to the book. 2. To hold same firmly in place. 3. Topermit of more leaves being added as desired. 4. To attain the aboveobjects in the simplest and cheap est possible manner. I attain theseobjects by the constructions illustrated in the accompanying drawings.

Figure l is a perspective view of a loose leaf binder constructed inaccordance with my invention. Fig. 2 is a vertical section of a pair ofmetal posts attached to the lower or bottom bookoover. Fig. 3 is avertical section of the upper or top cover of the book as it appearswhen detached from the book. Fig. 4- is a plan view of a pair of thesliding Fig. 5 is a plan view of a sliding lock when attached to theupper cover, and the binder unlocked. Fig. 6 is a plan view of the same,locked. Fig. 7 is the top View of a pair of washers used for locking themetal post-s or studs to lower cover of binder.

Similar letters refer to similar parts throughout the views.

Two or more metal posts A of any desired length are each fastened to theunder or lower cover X, of the said binder, by means of a wide, flathead on the end of the post fitting against the under side of the coverand a thin lock washer-F slotted, preferably with a key hole slot, toslip into or out of a transverse groove in the post A on the upper sideof the said under or lower cover. The upper cover Y of said binder ispunched with holes N at a distance uniform and co inciding with theposts A in the lower cover, so that the said posts will pass through theholes N so punched. The posts A are made with horizontal grooves S at asmany places as desired. 7

To the upper cover Y are fastened two thin pieces ofmetal B, which Idesignate locks. These are each fastened to the cover by means of twosplit rivets E. These rivets pass through oblong holes H punched in thesaid locks B, and through the upper cover of the binding, clenchingat T.The locks B are also each provided with a pear-shaped keyhole slot ii inthe center. The heads of the rivets E project over the edges of theoblong holes, and allow the locks B to slide the length of the oblongholes H. The diameter of the keyhole slot K at its wide end is such asto permit the post A to slip through freely, but at its narrow end isonly of a diameter permittingit to fit over the post A, at points wherethe grooves S are cut When the posts A are inserted through the 7 holesof the upper cover Y, and through the large end of slot K, the cover maybe lifted off or on at will, but when the lock pieces B are pushedslightly, the narrow ends of the holes K engage the grooves S, and coverY is firmly held in position. The act of moving the metal lock pieces Bthe length of the oblong holes H places the lock pieces B in suchposition as to release the cover Y, or to lock it in position.

It will be seen from the above description that the locking devices andcovers are entirely separate constructions and are only brought togetherin the laststage of manufacture. This reduces the cost of manufacture toa minimum and enables me to put on the market a loose leaf binder cheapenough for school use.

F or the drawing submitted I have supposed round posts to be used, butthe same idea may apply to posts of other shapes, and

the shape of the lock would have to be altered to suit the shape of postused.

I am aware that prior to my invention loose leaf binders have been madewith metal posts fastened to the binding covers, I therefore do notclaim such a combination broadly, but

hat I do claim as my invention and desire to secure by Letters Patentis 1. In a loose leaf binder the combination of the lower cover; a postpassing through the cover having a flat head formed thereon engaging theunder side of the cover and a transverse groove formed therein at theupper side of the cover; anda lock washer slotted to permit of itsengagement with and disengagement from the groove.

2. In a loose leaf binder the combination of the covers; a post passingthrough the cover having a flat head termed thereon engaging the underside of the under cover, a transverse groove formed therein at the upperside of the under cover, and a transverse groove at the upper side ofthe upper cover; a lock washer slotted to permit of its engagement withand disengagement from the groove at the upper side of the under cover;

10 and a movable slotted lock plate at the upper surface of the uppercover adapted to be ,veinber, 1908.

CHARLES BRIGHTMER CHAPMAN. Signed in the presence of C; G. JARVIS, M. E.MOULE, L. A. SATTON.

